[Newbie] Question about HA pair in real word
I am going to deploy F5 Big IP systems including 2 LTMs (v10) in real world. Everything is fine with LTM VE on VMware when using active/standby with network failover method and VLAN fail-safe. I have read a statement about combining network failover and hard-wired failover:
You use network failover in addition to hard-wired failover. Even with
serial cable failover configured, communication through network failover
is required for certain features to function properly, for example, the
communication that occurs over the network during failover mirroring.
I have three questions about active/standby
1. With active/standby, beside to use hard-wired failover (serial cable) with VLAN fail-safe and network mirroring, is it necessary to enable network failover?
2. In the case of active unit's VLAN down, if using VLAN fail-safe how does standby unit know to failover to active? through communication of network failover pair or hard-wired failover or configsync
(There are three areas to specify three pairs address: network failover, network mirroring, configsync.)
3. Are there any messages exchanged on serial cable or just voltage?
Thanks and Best Regards